Petilrs co



No. 752,768. PATENTED FEB. 23, 1904. A. M. GOODWIN.

TEMPERATURE REGULATING APPARATUS.

. APPLcATIoN FILED JULY 22, 1903.

N' *A @l/Wwf? g me wams Pumas cc.. Num-uno., wAsnluG-mrf. n. c.

Y UNITED ,STATES Patented February 23, 1904.

PATENT OFFICE.

ADAM4 M. GOODWIN, OF PITTSBURG, PENNSYLVANIA,

TO THE GOODWIN COMPANY, OF PITTS.

A CORPORATION OF PENNSYLVANIA.

MESNE ASSIGNMENTS, BURG, PENNSYLVANIA,

ASSIGN OR, BY

TEMPERATURE-REGULATING lAFPAIRATUS.

SPECIFICATION forming part ef Letters Patent No. 752,768, elated February 2e, 1904.

Application filed July 22, 1903. Serial No. 166,535. (No model.)

To all whom it may concern:

Be it known that I, ADAM M. GOODWIN, a citizen of the United States', residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Temperature-Regulating Apparatus, of which the following is a specication, reference being had to the accompanying drawing, forming part of this application, whichshows in sectional elevation a tin-coating apparatus provided with my improved temperature-controlled fuel and oil supply regulating device.

My -improvement relates to apparatus for coating sheet-iron with tin; and it has for its object to automaticallyregulate the temperature of the metal-bath and also of the` superimposed body of oil, so as to prevent too rapid deterioration, .deoxygenatiom or destruction of the oil due to the excessive heat. Ordinarily the temperature of thewoil should be maintained at from 37 50 to 395? Fahrenheit, and if the temperature materially exceeds such a degree the waste of oil becomes excessive, resulting in considerable loss. My invention is designed to prevent such loss, so that the apparatus may be continuously operated as economically as possible.

Referring now to the drawing, wherein the invention is illustrated, 2l represents a furnace structure having the combustion chamber or chambers 3, above which is set the tank 4," containing the bath of molten metal 5 and provided with a transverse depressed bridge 6, extendingsomewhat below the normal level of the metal-bath. The purpose of this construction is to provide separate oil-compartments 7 8, in which are contained separate bodies of oil resting upon the surface ofthe molten metal. Within the compartment 8 are located one or more pairs of feed-rollers 9 9, to which by guides 10 the plate is directed after having been introduced downwardly into the first compartment 7.

The foregoing construction is well known and does not, per se, form any portion of my present invention.

11 is a tank or reservolr contammg o1l connected with the chamber 8 by a pipe 12, preferably provided with a valve, which allows the hot oil in chamber 8 to flow back to tank 11 when cold oil is introduced, the hot oil always remaining at the top. For the purpose of supplying cold oil Vto the chamber 8, either to renew the supply therein or to reduce the temperature of the oil in said chamber, I have provided a pump 13,0f any suitable construction, from which by a pipe 14 the oil may be conveyed to the chamber 8 whenever desired. The plunger or piston 15 of the pump 13 is connected by its rod 16 with a pitman 17, attached to a driving-crank 18, mounted on shaft 19.

2O is a driven pulley loosely mounted on shaft 19 and provided with a clutch portion 21, with which a sliding clutch 22, splined to shaft 19, is adapted to engage, so that when the clutches are brought into engagement the pump will be actuated, and cold oil caused to flow into the chamber 8.

23 isa bell-crank lever pivoted at 24, one arm of which lever engages clutch 22, while to the other end is attached a bar 25, provided with an armature adapted to be moved by a solenoid-magnet 26. When the magnet is energized, the clutches will be engaged, resulting` in the desired feeding of the oil.

Located in the furnace chamber or chambers 3 are fluid-fuel burners 27, supplied by pipes 28 from a main 29, pilot-light burners 30 being also connected with the main by pipe 31. "The supply of fuel to the burner is control-led by one or more valves 32, interposed in the line of pipe and provided with a stem 33, connectedv at 34 witha lever 35, connected at 36 with a bar 37 of the armature of a so'- lenoid-magnet 38. The bar is provided with a temper-screw 39, by which its downward motion may be arrested or gaged, the stem 33 also being provided, if desired, with a coiled spring 4 0, by which the valve will be normally raised from its seat.

Immersed in the bath of oil within the chamber 8 is the bar 41 of a pyrometer having the usual indicating-dial 42 and needle or indicator 43.` To the indicator at the center in any l struction,

suitable manner is connected one of the con ductors, 44, of an electric circuit, the terminal of the other conductor,4, being provided with a contact-point 46, with which the indicator or a supplemental contact-arm actuated thereby will make contact when the oil in chamber 8 has been heated to an excessive degree. A circuit is then established through battery B, energizing magnet 47, which in turn actuates armature 48, so as to close a circuit through the conductors, which energizes the main magnets 26 and 38. These magnets are connected in series by suitable conductors 49, 50, and 51 with a generating source of electrical energy 52, as a dynamo.

It will be understood that either of the magnets 26 or 38 may be cut out, so as to operate the fuel-burners 27 or the pump 13 alone, and such an operation is contemplated by my invention, although ordinarily the best results may be had by controlling the flow of fuel and the supply of oil at the same time.

In place of pumping oil into the chamber 8 the pump may be adapted to supply a stream of cold air or other cooling uid into the bath of oil, and I reserve the right to such adaptation of the invention.

The operation is as follows: The. temperature of the oil in chamber 8 having beenraised above the normal or desired heat, so as to cause the pyrometer-contacts to be established, the magnet 26 becomes energizedthrowing in the clutch and causing the pump to supply cold oil, thereby immediately reducing the temperature of the main bath in chamber 8. Simultaneously, by the energy of magnet 38, the valve 32 is seated or lowered, cutting olf the supply of fuel to the burner, permitting the temperature of both the metal 5 and the superimposed oil to be reduced by natural radiation. After the temperature of the oil has been suiiiciently reduced the pyrometer will operate to break the circuit, whereupon the pump 13 will cease supply will be reestablished. These conditions will continue until the oil again becomes too hot, when the operation will be repeated and continue as long as the apparatus is in use.

The device is very eliicient and reliable in operation, it is simple and economical in conand is found to efectually reduce the cost of tinning plates on account of the great saving ofoil.

While the apparatus as constructed has given good results, I do not desire to be limited to the exact design or details of construction or arrangement of the parts, as it is obvious that various changes or modifications may be made therein by the skilled mechanic, and all such are to be considered as within the scope of the Y following claims.

I-Iaving described my invention, claim is l. The combination with what I a melting tank to operate and the fuelprovided with means for coating sheet metal, and a heating device therefor, of a valve adapted to control the supply of fuel to the heating device, a magnet connected with said valve, and a circuit for the magnet, with means actuated by variations in the temperature of the contents of the melting-tank for making and breaking the circuit through said magnet, whereby the contents of the tank are maintained and applied to the sheet metal at a constant temperature, substantially as set forth.

2. The combination with a melting tank provided with means for coating sheet metal, and a heating device therefor, of a valve adapted to control the supply of fuel to the heating device, a magnet connected with said valve, a circuit for the magnet, and a pyrometer immersed in the contents of the melting-tank and provided with terminals of said circuit adapted to be connected by operation of the pyrometer, whereby the contents of the tank are maintained and applied to the sheet metal at a constant temperature, substantially as set forth.

3. The combination with a melting tank provided with means for coating sheet metal, of a device for furnishing iuid thereto, means for actuating said device, and means controlled by variations in the temperature of thecontents of the tank for controlling said actuating means, whereby said fluid will be maintained at substantially the same temperature, substantially as set forth.

4. The combination with a melting-tank provided with means for coating sheet metal, of a device for delivering iiuid thereto, means for/intermittently actuating said device, a magnet and lever adapted to control the operation of said means, and means adapted to be actuated by variations in the temperature of the contents of the tank for making and breaking a circuit through said magnet, whereby said iuid will be maintained at substantially the same temperature, substantially as set forth.

5. The combination with a melting-tank provided with means for coating sheet metal, of a device for delivering fluid thereto, means for intermittently actuating said device, a magnet and lever adapted to control said means, and a pyrometer immersed in the contents of said tank and provided with circuitterminals adapted to be connected and disconnected by operation of the pyrometer, whereby a circuit is established and broken through said magnet to control the actuating means, substantially as set forth.

6. The combination with a melting-tank provided with means for coating sheet metal,

of a supplemental reservoir, a pump therefor magnet provided with an armature connected with said lever, and means controlled by vatherewith, a N

riations in the temperature of the contents of the tank for making and breaking a circuit through said magnet to control the operation of the pump, substantially as set forth.

7. The combinationwith a melting-tank provided with means for coating sheet metal, of a supplemental reservoir, a pump therefor provided with a supply-pipe for the tank, a driving-shaft and operating connections for the pump, a driving-pulley and friction-chitch mechanism, a lever connected therewith, a magnet provided with an armature connected with said lever, a generator connected with said magnet, an intervening switch, a magnet adapted to actuate said switch, and a pyrometer provided with contact-terminals and connections to said magnet, whereby the main circuit is established orl broken by variations in the 'temperature of the contents of the tank, substantially as set forth.

8. The combination withA a melting-tank provided with means for coating sheet metal, of a heatingdevice therefor and means for supplylng iuid to the tank, a magnet for controlllng the fuel-supply, amagnet for control-` ling the operation of the iuid supplying means, a generator connected in series with said magnet, a switch, a magnet adapted to actuate said switch, and a device controlled by variations in the temperature of the contents. of the tank and provided with contacttermlnals, with connections therefrom to said controlling-magnet, whereby the contents of the tank will be maintained at substantially the same temperature, substantially as set forth.

In testimony whereof I aflix my signature in presence of two witnesses'.

l ADAM M. GOODWIN. Witnesses:

JAs. J. MGAFEE, C. M. CLARKE. 

